121121301021 has 16 divisors (see below), whose sum is σ = 195422603904. Its totient is φ = 65140867584.

The previous prime is 121121301011. The next prime is 121121301107. The reversal of 121121301021 is 120103121121.

It is not a de Polignac number, because 121121301021 - 2¹⁴ = 121121284637 is a prime.

It is a super-2 number, since 2×121121301021² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121301011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169637320 + ... + 169638033.

It is an arithmetic number, because the mean of its divisors is an integer number (12213912744).

Almost surely, 2^121121301021 is an apocalyptic number.

It is an amenable number.

121121301021 is a deficient number, since it is larger than the sum of its proper divisors (74301302883).

121121301021 is a wasteful number, since it uses less digits than its factorization.

121121301021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339275380.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 121121301021 its reverse (120103121121), we get a palindrome (241224422142).

The spelling of 121121301021 in words is "one hundred twenty-one billion, one hundred twenty-one million, three hundred one thousand, twenty-one".